Storage Resource Management
Content Addressed Storage
What is CAS?
• Content Addressed Storage
– systems that store data in such a way that once
stored it cannot be duplicated or modified
• Different vendors offer solutions and each uses a proprietary
technique to identify the data
• Can be used in support of an archive solution
– data cannot be modified once stored
– retention policies can be set by some vendors
• Not a backup solution
– does not require a second copy of data
– only guarantees a non-changed copy of data
This is used for fixed content data.
Here our clients can write some data. The data is assigned an object
identifier. It then gets written down to our storage and when we generate this
unique identifier.
That file cannot be changed because if the file changes it will get a different
identifier.